DC_Initlizer/ConfigEditor/MainWindow.xaml

<Window
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:appconfig="clr-namespace:ConfigEditor.SubPage.AppConfig"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:evseconfig="clr-namespace:ConfigEditor.SubPage.EvseConfig"
    xmlns:local="clr-namespace:ConfigEditor"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    Title="ConfigEditor"
    Width="1100"
    Height="450"
    mc:Ignorable="d"
    x:Class="ConfigEditor.MainWindow">
    <Window.Resources>
        <Style TargetType="TextBox">
            <Setter Property="VerticalContentAlignment" Value="Center" />
        </Style>
        <Style TargetType="Label">
            <Setter Property="VerticalContentAlignment" Value="Center" />
        </Style>
        <Style TargetType="GroupBox">
            <Setter Property="BorderThickness"  Value="3" />
            <Setter Property="Padding"  Value="5" />
        </Style>
    </Window.Resources>
    <TabControl x:Name="uxMainTabControl">
        <TabItem Header="EvseConfig">
            <ScrollViewer HorizontalScrollBarVisibility="Disabled" VerticalScrollBarVisibility="Visible">
                <evseconfig:EvseConfigPanel x:Name="uxEvseConfigPanel" />
            </ScrollViewer>
        </TabItem>
        <TabItem Header="AppConfig">
            <ScrollViewer HorizontalScrollBarVisibility="Disabled" VerticalScrollBarVisibility="Visible">
                <appconfig:AppConfigPanel x:Name="uxAppConfigPanel" />
            </ScrollViewer>
        </TabItem>
    </TabControl>
</Window>